Frequencies for first 10,000 rows of ca_hypo variable in natlterr2015 dataset :

Hypospadias |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,805       88.05       98.83
          U |        114        1.14       99.97
          Y |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016